Page 361 - Bürkert

OEM radar measuring device for aggressive medium

8136

• For level measurement up to 20 m,
4-20 mA/Hart - 2 wires
• Adjustable via Display, key operation or
PC-Tool with DTM
• ATEX approvals
• Insensitive to variations of temperature,
pressure, medium data of the product
and gas layers

Type 8136 is a non-contact radar level measuring device for continuous Envelope Dimensions [mm] (see datasheet for details)
level measurement.
The unit is available in two versions: A
• with encapsulated horn antenna particularly suitable for level measure-
ment of aggressive liquids in small vessels.
• with plastic horn antenna particularly suitable for measurement in open
flumes or gauge measurement in waters.

Technical Data
Materials
Housing / Cover PBT, Stainless steel. 316L / PC
Seal ring / Ground terminal NBR / St. st. 316Ti/316L (1.4571/1.4435) B
Mounting strap / Fixing screws St. st. 304 (1.4301) / St. st. 316L (1.4435)
Wetted parts
Encapsulated horn antenna version
Process connection/Antenna/Seal PVDF/PVDF (completely encapsulated)/FKM
Plastic horn antenna version
Process connection Stainless steel 316L (1.4435)
Horn antenna / Focus lens PBT-GF30 / PP
Display* LCD in full dot matrix (option)
Process connection Thread G 1½” or NPT 1½”
(Encapsulated horn antenna version) A B
Mounting strap 170 mm 75,5 123
(Plastic horn antenna version)
Max. torque mounting boss 4 Nm
(mounting screws - strap on the sensor housing)
Electrical connection Cable glands M20 x 1.5
Measuring value Distance between process connection Technical Data (continued)
and product surface
Min. dielectric figure μr > 1.6 Electrical data
Dead zone 50 mm 1) Operating voltage 14 - 36 V DC or 14 - 30 V DC
Measuring range 0.05 to 10 m (Encapsulated horn antenna ver.) (Ex ia instrument)
0 to 20 m (Plastic horn antenna version) Permissible residual ripple < 100 Hz: Uss < 1 V
Process temperature -40 ºC to +80 ºC 100 Hz... 10 kHz: Uss < 10 mV
Vessel pressure -1 to 3 bar (-100 to 300 kPa) Output signal 4... 20 mA/HART
Vibration resistance Mechanical vibrations with 4 g and Resolution 1.6 μA
5-100 Hz Fault signal current output unchanged 20.5 mA,
Temperature coefficient 0.03%/10 K (Average temperature coefficient 22 mA or
of the zero signal - temperature error) < 3.6 mA (selectable)
Resolution Max. 1 mm Current limitation 22 mA
Frequency K-band (26 GHZ technology) Load see load diagram
Interval approx. 1 s Damping 0... 999 s, adjustable
Beam angle at 3 dB 22° (Encapsulated horn antenna vers.) - (63% of the input variable)
10° (Plastic horn antenna vers.) * to be ordered separately
Adjustment time > 1 s (dependent on the parameter adjustment) 1) Encapsulated horn antenna version. In products with low dielectric value up to 50 cm.
Accuracy ± 2 mm

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